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@@ -438,4 +438,8 @@ This is a Xwayland bug. The workaround is to rearrange your workspaces to not us
 
 ### Xwayland DPI increases after hotplug
 
-This is an [Xwayland bug](https://gitlab.freedesktop.org/xorg/xserver/-/issues/731). This usually results in oversized text. As a workaround, add `Xft.dpi: 96` to `~/.Xresources` and add `exec xrdb -load ~/.Xresources` to your Sway config.
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+This is an [Xwayland bug](https://gitlab.freedesktop.org/xorg/xserver/-/issues/731). This usually results in oversized text. As a workaround, add `Xft.dpi: 96` to `~/.Xresources` and add `exec xrdb -load ~/.Xresources` to your Sway config.
+
+### I can't open links in external applications in Firefox
+
+If you get the message "Firefox is already running", set the environmental variable `MOZ_DBUS_REMOTE=1` (Firefox 74+, dbus required). See explanation here: [https://mastransky.wordpress.com/2020/03/16/wayland-x11-how-to-run-firefox-in-mixed-environment/](https://mastransky.wordpress.com/2020/03/16/wayland-x11-how-to-run-firefox-in-mixed-environment/)